2008-07-05 15:03:18

by Bradley Hanna

Subject: Creating syscalls: Under an x86_64 arch, where is the syscall table located?

I am trying to create a syscall for testing purposes. I have a kernel
configured for x86_64 arch and need to know where the syscall table is
located. I believe I have found the unistd.h file that I need under
'include/asm/unistd_64.h' but I cannot find a file containing the
'sys_call_table' that corresponds with that 'unistd_64.h' file. I can
find a file called syscall_table_32.S, but no table for 64. The table
is no longer located in entry.S, so where do I find it? The
'__syscallN' macro is not finding my syscall definition.

Is that enough information?

thanks for your patience,

brahan

2008-07-05 16:29:24

by Rabin Vincent

Subject: Re: Creating syscalls: Under an x86_64 arch, where is the syscall table located?

On Sat, Jul 05, 2008 at 11:03:49AM -0400, Bradley Hanna wrote:
> I am trying to create a syscall for testing purposes. I have a kernel
> configured for x86_64 arch and need to know where the syscall table is
> located. I believe I have found the unistd.h file that I need under
> 'include/asm/unistd_64.h' but I cannot find a file containing the
> 'sys_call_table' that corresponds with that 'unistd_64.h' file. I can
> find a file called syscall_table_32.S, but no table for 64. The table
> is no longer located in entry.S, so where do I find it? The
> '__syscallN' macro is not finding my syscall definition.

sys_call_table for x86_64 is defined in arch/x86/kernel/syscall_64.c.

Rabin